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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 682 · 40 sums
TalentJR

The method (Count on): Start with the bigger number. Count on the smaller number, one finger at a time. For a missing number (8 + ? = 15), count on from 8 up to 15, or take away: 15 − 8.

NameDateTime takenScore ___ / 40
  1. 1.There are 2 red crayons and 6 pink crayons. How many crayons are there in all?
  2. 2.8 + 10 =
  3. 3.5 + 1 + 14 =
  4. 4.10 + 1 =
  5. 5.17 + 2 =
  6. 6.There are 11 yellow crayons and 4 red crayons. How many crayons are there in all?
  7. 7.Tara has 10 balloons and gets 6 balloons more. How many balloons does Tara have now?
  8. 8.There are 4 yellow flowers and 4 white flowers. How many flowers are there in all?
  9. 9.14 + 3 =
  10. 10.1 + 2 + 17 =
  11. 11.Tara has 7 kites and gets 9 kites more. How many kites does Tara have now?
  12. 12.There are 10 green balloons and 9 blue balloons. How many balloons are there in all?
  13. 13.There are 10 pink balls and 10 red balls. How many balls are there in all?
  14. 14.1 + 3 + 3 =
  15. 15.3 + 3 + 14 =
  16. 16.1 + 3 + 6 =
  17. 17.There are 11 yellow flowers and 5 blue flowers. How many flowers are there in all?
  18. 18.6 + ? = 18
  19. 19.There are 9 red crayons and 8 blue crayons. How many crayons are there in all?
  20. 20.7 + 7 =
  21. 21.There are 8 red balloons and 7 blue balloons. How many balloons are there in all?
  22. 22.? + 11 = 20
  23. 23.8 + ? = 15
  24. 24.Dev has 2 kites and gets 8 kites more. How many kites does Dev have now?
  25. 25.8 + 7 + 5 =
  26. 26.? + 7 = 14
  27. 27.2 + 1 + 16 =
  28. 28.7 + 8 + 3 =
  29. 29.16 + 1 =
  30. 30.6 + ? = 10
  31. 31.There are 3 green kites and 14 blue kites. How many kites are there in all?
  32. 32.? + 5 = 19
  33. 33.1 + 8 + 2 =
  34. 34.There are 12 blue flowers and 6 yellow flowers. How many flowers are there in all?
  35. 35.Gurpreet has 11 pencils and gets 1 pencil more. How many pencils does Gurpreet have now?
  36. 36.5 + 6 + 4 =
  37. 37.Joseph has 15 mangoes and gets 1 mango more. How many mangoes does Joseph have now?
  38. 38.Aarav has 2 marbles and gets 18 marbles more. How many marbles does Aarav have now?
  39. 39.2 + 4 + 13 =
  40. 40.? + 4 = 10

Answer key

  1. 8
  2. 18
  3. 20
  4. 11
  5. 19
  6. 15
  7. 16
  8. 8
  9. 17
  10. 20
  11. 16
  12. 19
  13. 20
  14. 7
  15. 20
  16. 10
  17. 16
  18. 12
  19. 17
  20. 14
  21. 15
  22. 9
  23. 7
  24. 10
  25. 20
  26. 7
  27. 19
  28. 18
  29. 17
  30. 4
  31. 17
  32. 14
  33. 11
  34. 18
  35. 12
  36. 15
  37. 16
  38. 20
  39. 19
  40. 6

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